汽车专业英语Powertrain要点分析.ppt

汽车专业英语 Specialty English for Automobile 刘永刚 E-mail: andyliuyg@cqu.edu.cn Tel:Chapter 3 Power train overview : a general review or summary of a subject 概述 综述 The function of the power train of an automobile is to provide the forces necessary for locomotion. The forces are produced by the conversion in the IC (Internal combustion) engine of the chemical energy in liquid fuels (or in the electric motor of electrical energy) into the energy of motion (kinetic energy). Locomotion: movement or the ability to move from one place to another he preferred walking to other forms of locomotion. Versions of power train Fairly even Universal joint Longitudinal // Transverse Occasionally occurring, appearing, or done infrequently and irregularly Permanent or selectable Each tire is evenly abraded 磨损均匀 capability Compact layout Driving drive driven Axle wheel: 车桥 车轮 steering axle Interior room // exterior Equilibrium: state in which opposing forces or influences are balanced Rolling /climbing /acceleration /air Resistance Drag: the longitudinal retarding force exerted by air or other fluid surrounding a moving object Quantity : the figure or symbol representing this Face area: 迎风面积 Dynamic tire radius：滚动半径 rolling static radius Mass moment of inertia Incline 斜坡 Rad: radian 弧度 Element of the power train 1－Clutch 2－Transmission 3－UJ (Universal joints) 4－Drive shaft 5－Final drive 6－Differential 7－Half-shaft Driving away 开走 Guarantee optimum operation of the engine (electric motor) in terms of fuel consumption and exhaust emissions. 保证，在……方面 Standstill, driving away and power interruption are made possible by operation the clutch. Two types of toothed-gear transmission are predominant: spur-gear transmissions of the counter-shaft type as manually transmission, and planetary-gear transmissions as power-shift transmissions. cornering 转弯 Uniform distribution 均匀分布 3.2 Clutches Dry friction clutch Task: a piece of work to be done or undertaken It